Every year I have my students design movie posters as an art exercise, so I'm partial to this thread. I have a bit of a hard time separating the poster from the film: the posters I like best are for films I also like, and if there are great posters out there for lousy movies (as I'm sure there are), I'm pretty sure I'd like the poster less because of it.

I love the posters of the '70s--I don't think the art started to go out of it till the '80s. If you look closely at the Nashville poster, you'll see that Judith Crist and Vincent Canby are quoted by name, but Kael, from what must be one of the two most famous movie reviews of the '70s (along with her own Last Tango review), disappears behind the New Yorker attribution.